METHOD FOR MANUFACTURING POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE

• Main Authors: TSUCHIMOTO KAZUYOSHI, YOSHIKAWA SENRI, SUGINO YOICHIRO, HAMAMOTO EIJI, KUSUMOTO SEIICHI
• Format: Patent
• Language: English
• Published: 26.10.2001
• Edition: 7
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a method for manufacturing a polarizing plate without a record disc groove-like projecting and recessing shape on a surface of a protective layer caused by stretching of a polarizing film, with a clear reflection image when observed by reflection, thereby improving appearance, and a liquid crystal display device. SOLUTION: In the case a polarizer with >=35% transmissivity and >=90% polarization degree is obtained, the water content of the polarizer is kept in 5-30% range while a protective layer is stuck on one or both surfaces of the polarizer (provided that a method for measuring the water content of the polarizer is based on the equation the water content (%) of the polarizer = [(A-B)/B]×100 using the polarizer's weight before sticking (A) and the weight after keeping the polarizer in a drier under 120 deg.C for seven hours (B)).